Pion double-charge-exchange reaction on sup 44 Ca at 50 MeV

• Published in: Physical review. C, Nuclear physics Vol. 43:3
• Main Authors: Baer, H.W., Leitch, M.J., Mishra, C.S., Weinfeld, Z., Piasetzky, E., Comfort, J.R., Tinsley, J., Wright, D.H.
• Format: Journal Article
• Language: English
• Published: United States 01-03-1991
• Subjects: 651520 - Nuclear Properties & Reactions, A=39-58, Experimental; ACCELERATORS; AMPLITUDES; ANGULAR DISTRIBUTION; BETA DECAY RADIOISOTOPES; CALCIUM 44 TARGET; CHARGE-EXCHANGE REACTIONS; CHARGED-PARTICLE REACTIONS; CROSS SECTIONS; DIFFERENTIAL CROSS SECTIONS; DISTRIBUTION; ELECTRON CAPTURE RADIOISOTOPES; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; HADRON REACTIONS; INTERMEDIATE MASS NUCLEI; ISOBARIC ANALOGS; ISOTOPES; LAMPF LINAC; LINEAR ACCELERATORS; MATRIX ELEMENTS; MESON FACTORIES; MESON REACTIONS; MEV RANGE; MEV RANGE 10-100; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; NUCLEI; PION PLUS REACTIONS; PION REACTIONS; RADIOISOTOPES; SCATTERING AMPLITUDES; TARGETS; TITANIUM 44; TITANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.43.1458

Angular distributions of pion double-charge-exchange (DCX) reactions at 50 MeV are reported for the ground-state (g.s.) and the double-isobaric-analog-state (DIAS) transitions on {sup 44}Ca. These distributions have similar shapes and magnitudes and are considerably more forward peaked than those of the lighter {ital T}=1 nuclei. The spectra at forward angles exhibit nearly exclusive excitation of the g.s. and DIAS. By using a formulation based on the shell model, the magnitude of the scattering amplitude {ital B} associated with nonanalog intermediate state transitions is extracted from the data.